Damper-regulator.



No. 637,I25. Patenfed Nov. I4, |899. S. A. K'ELLAM &. J. B. BISCHUFF.

DAMPEB REGULATOR.

(Application led Har. 31, 1899.)

(No Mndel.)

QA V42,

THE Nonms Pzvsns un, worounmv. WASHINGTON. n c,

UNITED STATES ATnNT OFFICE.

SAMUEL A. KELLAM, OF OXFORD, AND JOHN B. BISOHOFF, OF DETROIT,

. MICHIGAN.

DAM PER-REGULATO R.

SPECIFICA TION forming part of Letters Patent No. 637,125, dated November 14, 1899.

Application filed March 31, 1899.` Serial No. 711,259. (No model.)

T0 all whom t may concern;

Be it known that we, SAMUEL A. KELLAM, residing at Oxford, Oakland county,and JOHN B. BISCHOFF, residing atDetroit,in the county of Wayne, State of Michigan, citizens of the United States, have invented certain new and useful Improvements in Damper-Regulators, of which the followingis a specification, reference being had therein to the accompanying drawings.

Theinvention relates to an improved steamdamper regulator for controlling the pressure in steam-boilers; and the essential object of our invention is to producea device of the type referred to that will be positive in its action, compactin formation, and of such simple construction as will permit of its being manufactured at a minimum price.

A further object of the invention is to so construct the regulator that the packing ordinarily employed in such devices Will be entirely dispensed with.

With these objects in view our invention consists in the novel type of damper-regulator and in the peculiar combination, construction, and arrangement of parts, as more fully hereinafter described and shown.

In the drawings, Figure l is a side elevation of our improved regulator. Fig. 2 is a vertical central section through the valvecasing and its adjacent parts. Fig. 3 is a section through the tension device.

The reference-letter A designates a valvecasing of any peculiar type, provided with a steam-inlet B and an outlet O. Within the valve-casing is a diagonal partition D dividing the interior of said casing into the chambers E and F. lVithin the partition is arranged the valve-guide G, the end a of which constitutes the seat for the valve H.

I designates a winged guide-bar for the valve, which is adapted to slidingly engage within the valve-guide G.

At the lower portion of the casing and leading from the chamber F is an outlet-port b, in which port and threadedly engaging therein is a hollow stem c. The stem is provided with an interior screw-thread and with adripstem d.

The letter e designates a headed screw extending within the hollow stem and adapted to be normally beyond thedrip-stem d. Opposite the guide G in the valve-casing is a plug J, and extending within the opposite side of the casing is a threaded plug K. The plug referred to comprises a plug proper, L, and a head M, having formed therein a socket O. The plug is likewise provided with acentral aperture P and with a recessed portion Q, said portion being formed in the bottom of the socket. Threadingly engaging the head M is a nut R, the meeting end of which is recessed at S, and clamped between the recessed ends of the plug and nut is a flexible diaphragm T. The nut is provided with a central'aperture U and with a reduced threaded portion V.

W is abracket having a perforated body portion, which is adapted to be sleeved over the reduced portion of the nut and to be secured to the latter by means of a lock-nut Y.

Vithin the aperture P formed within the plug is arranged a valve-stem A', the same bearing normally against the diaphragm T and at the opposite end against the valve H, a socket f being preferably formed in the valve-head, into which the valve-stem is adapted to extend. Upon the opposite side of the diaphragm and having one end adapted to bear normally against the same is a similar valve-stem B', and O is a 'spring-controlled lever which bears against the free end of the latter stem. VIn construction the lever comprises a bar E', pivoted within an extension D on the bracket and the opposite end terminating in an apertured head F.

G' designates a spring secured to the valvecasing, and H' is a threaded bolt connecting the free end of the lever-bar Ewith the spring. Any type of spring may be employed; but the one preferably used consists, essentially, of a coiled spring I', having lixedly secured at each being formed within the perforations. One of the plates is adapted to threadingly engage a nipple K',formed upon the valve-casing, and the opposite plate is adapted to receive the free end of the threaded bolt H'.

L designates athumb-nut or head upon the bolt last referred to.

The lower end of the valve-casing B is adapted to be connected to a boiler, and to end a perforated plate, such as J', a thread IOO the upper portion C is secured a hollow piston M', open at both ends and provided at its upper end with an annular head O. Engaging over the piston in the usu'al manner is an outer cylinder P,which terminates in a cap Q.

R' designates an apertured lug upon the cylinder, which is connected in any suitable manner with the damper that is to be regulated. y

The operation of the device is well understood and is as follows: Vheu the steampressure is sufficient to raise the valve from its seat, it enters the hollow piston and raises the cylinder. The cylinder being connected to the damper in any suitable manner the damper is moved in one direction. As soon as the pressure reduces and the valve closes by the tension of the spring I the steam will condense and the cylinder will fall, either by its own weight or by means of any additional weight that may be applied to it or to counterbalance the damper, so as to move the damper in the opposite direction. These connections to the damperbeing well known, we do not deem it necessary to illustrate the same. The water of condensation finds exit through the drip-valve at the lower end of the valvecasing.

It will be observed from the construction of our device that by recessing the ends of the plug and nut and by tightly clamping a flexible diaphragm between said ends we provide efective means for preventing the steam passing from without the valve-casing except through the passage leading into the piston and dispense entirely with the use of packing. The diaphragm being, as before stated, lexible, movement is readilyimparted to the stem B by the valve-stem A', and the tension of the springis regulated to a nicety by means of the adjusting-bolt H.

What we claim as our invention is- 1. In a steam-damper regulator, the combination of a valve-casing and a valve therein, van apertured plug extending within the casing opposite the valve, an apertured nut clamped to the plug, the meeting ends of the plug and nut being recessed, a flexible diaphragm clamped between the recessed ends, a valve-stem within the plug, the opposite ends thereof bearing directly against the valve and diaphragm respectively, a similar and independent outer valve-stem having one end bearing against the opposite face of the diaphragm and the other end projecting beyond the nut, and means independent of the valvestem immediately adjacent to the valve, constructed to bear against the free end of the outer stem substantially as and for the purpose described.

2. In a steam-damper regulator, the combination of a valve-casing, a partition therein extending from side to side and dividing the interior of the casing into two complementary chambers, a valve-guide within the partition, a valve for the guide, an apertured plug extending within the wall of one of the chambers opposite the valve, an apertured nut clamped to the plug, the meeting ends of the plug and nut being recessed, a flexible diaphragm clamped between the recessed ends, a valve-stein within the plug, the opposite ends of which bear directly against the valve and diaphragm respectively, a similar and independent outer valve-stem having one end bearing against the opposite face of the diaphragm and the other end projecting beyond the apertured nut, and a spring-controlled lever, independent of the valve-stem immediately adjacent to the valve, bearing against the free end of the outer stem, substantially as and for the purpose described.

3. In a steam-damper regulator, the combination of a valve-casing, a partition therein extending from side to side and dividing the interior of the casing into two complementary chambers, a valve-guide within the partition, a valve for the guide, an apertured plug extending within the wall of one of the chambers opposite the valve, said chamber being provided with a valve-controlled outlet, an apertured nut clamped to the plug, the meeting ends of the plug and nut being recessed, a flexible and imperforate diaphragm clamped between the recessed ends, a valve-stem within the plug, the opposite ends of which bear directly against the valve and diaphragm respectively, a similar and independent outer valve-stem having one end bearing against the opposite face of the diaphragm and the other end extending beyond the nut, and a spring-controlled lever, independent of the valve-stem within the nut, bearing against the free end of said latter stem, substantially as and for the purpose described.

4. The combination of a valve-casing, a valve therein, the valve-stein, and means acting through the stem for normally holding the valve to its seat com prising a bracket connected to the casing, a lever pivoted in the bracket and bearing against the outer end of the valve-stem, a coiled spring carrying at each end a threaded apertured plate, a threaded nipple upon the valve-casing with which one plate engages and a headed bolt extending through the free end of the lever and engaging the remaining plate upon the spring.

In testimony whereof We affix our signatures in presence of two witnesses.

SAMUEL A. KELLAM. JOHN B. BISCHOFF.

Vitnesses:

JAMES WHITTEMORE, M. B. ODOGHERTY.

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